Difference Between Brachiopod and Bivalve

Thekey differencebetween brachiopod and bivalve is thatbrachiopod belongs to the phylum Brachiopoda while bivalve belongs to the phylumMollusca。

Brachiopod and bivalve are two different organisms that have a shell with two valves. However, the two valves of the brachiopod shell are unequal in size while the two valves of the bivalve shell are equal in size. Both brachiopods and bivalves arebilaterally symmetrical。Moreover, they are aquatic无脊椎动物。然而,尽管他们看起来相似外具有吸引力rance, they belong to two different phyla. Brachiopods belong to phylum Brachiopods while bivalves belong to phylum Mollusca.

内容

1.Overview and Key Difference
2.什么是Brachiopod
3.什么是双壳类
4.Similarities Between Brachiopod and Bivalve
5.并排比较 - 表格形式的Brachiopod vs双壳类
6.概括

什么是Brachiopod？

Brachiopod is an invertebrate that belongs to phylum Brachiopoda. They have a shell with two valves closing each other. Usually, one valve is larger than the other. The larger valve has a hole called pedicle foramen, hence the name pedicle valve. The smaller valve is the brachial valve that contains a brachidium.

Brachiopods are suspension feeders living only in marine water. There are two major classes of brachiopods as inarticulate brachiopods and articulate brachiopods.

什么是双壳类？

Bivalves are aquatic animals that have two matching valves in their shell. They belong to phylum Mollusca. The two valves fuse with each other by adductor muscles and a ligament.

Bivalves are invertebrates. They live in marine water, fresh water as well as in brackish water. Bivalves include more than 15,000 species of clams, oysters, mussels, scallops, etc.

What are the Similarities Between Brachiopod and Bivalve?

• Brachiopod and bivalve are invertebrates that belong to Kingdom Animalia.
• Both brachiopod and bivalve have adductor muscles.
• 他们有一个有两半的贝壳。
• Moreover, their shells are made up of calcite.
• 另外，它们还有上皮地幔。
• Furthermore, they are bilaterally symmetrical.
• Besides, both brachiopod and bivalve are suspension feeders.

What is the Difference Between Brachiopod and Bivalve?

Brachiopod and bivalve are two invertebrates that have a shell composed of two valves. But, they belong to two different phyla. Brachiopod belongs to phylum Brachiopoda while bivalve belongs to phylum Mollusca. So, this is the key difference between brachiopod and bivalve. Moreover, brachiopod lives only in marine environments while bivalve lives in marine, freshwater and brackish water environments. Therefore, this is also a difference between brachiopod and bivalve.

Moreover, a significant difference between brachiopod and bivalve is their valves. The brachiopod shell has two valves which are unequal in size while the bivalve shell has two valves which are equal in size.

概括– Brachiopod vs Bivalve

Brachiopod belongs to phylum Brachiopoda. It has a shell with unequal two valves. On the other hand, bivalve belongs to phylum Mollusca and has a shell with equal two valves. Furthermore, brachiopods live only in marine habitats while bivalves live in both marine and freshwater environments. Thus, this summarizes the difference between brachiopod and bivalve.

Reference:

1.“Bivalve.” Bivalve – an Overview | ScienceDirect Topics,Available here。
2.莫顿，布莱恩。“双壳类。”2019年3月18日Available here。

Image Courtesy:

1. “Brachiopod fossil”(CC BY 2.5)viaCommons Wikimedia
2.“ Cockle（Bivialve）”伯纳德·斯普拉格（Bernard Spragg）。新西兰（公共领域）通过Flickr